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Cells and Stuff
Cells and Stuff
•6.12 A Understand that all organisms are composed of one or more cells
•6.12B Recognize that the presence of a nucleus determines whether a cell is
prokaryotic or eukaryotic
Cells and Stuff
Look for the answers to these questions as you skim
through the articles, and write what you find in your
notebook :
•Who first viewed cells through a microscope, and when?
•What is the cell theory?
•What are some interesting things to note about cells?
Robert Hooke
•English Scientist who looked at a slice of cork through a
microscope in 1655
•He observed tiny, room-like, hollow structures
•He called these structures “cells” because they reminded
him of the rooms that monks lived in
•Only the outer walls (cell walls) were visible since the cork
cells were not alive
•Hooke is credited with the discovery of the cell
•“Cell” means tiny room in Latin
Question…
Is this when cells were invented?
http://en.wikipedia.org/wiki/Robert_Hooke
Cell Theory
1.All organisms (life forms) are made of cells
2.The cell is the basic unit of life
3.All cells come from other cells
Important Vocabulary
• Cell – the basic unit of life.
• Nucleus – the control center of the cell;
contains DNA (information)
• Single-celled/Unicellular – consisting of one cell
• Multi-cellular – consisting of many cells
• Organism – life form
• Eukaryote – organisms that have a nucleus
• Prokaryote – organisms that do not have a
nucleus
General Cell Information
All living things are composed of at least one cell.
Organisms made up of only one cell are referred to as
unicellular. Organisms made up of many cells are called
multi-cellular. Large organisms, such as humans, have
billions of cells. Students might think that most
organisms on Earth are multi-cellular. In fact, the
majority of organisms are microscopic, single-celled
organisms such as bacteria, algae, certain fungi, and
protozoa.
Taken from neisd.net
Taken from neisd.net